Most infant plain t-shirts are made from 100% cotton, often organic cotton. Some styles are cotton blends — for example, listings may show blends that include around 60% cotton.
Infant plain t-shirts are available in short- and long-sleeve versions. Common sleeve styles include basic set-in sleeves and raglan sleeves; some long-sleeve styles feature cuffed wrists.
Most infant t-shirts use lightweight, single-layer jersey construction. Some cuffed long-sleeve versions are made from a slightly heavier jersey intended for cooler months.
Care directions typically recommend machine washing and tumble drying. Some listings specify machine wash cold and tumble dry low.
Some infant tees carry industry certifications such as GOTS (for organic yarn) and OEKO-TEX Standard 100.
Items are commonly labeled 'Infant' and use age-size ranges such as 0–3 months up to 18–24 months in product titles.
Sensory-friendly tees emphasize soft natural fibers and avoid irritating elements, and are described as suitable for babies with sensitivities or allergies.